Photochemistry of halogenocarbon compounds. Part 4. Photochemical conversions of some fluorinated aza- and diaza-cyclohexadienes

Abstract

Photoreaction of perfluoro-4-isopropyl-1-azacyclohexa-1,3-diene (1) gives a cyclobutene derivative (4), apparently via ring opening to an azatriene. Similarly, the perfluoro-di-isopropyldiazacyclohexa-1,4-dienes (7) and (10) undergo a retro [_π4 +_π2] process and, in one case, a diazatriene (11) was isolated. Conversions of some apparently similar systems did not occur.